LXR linux/include/asm-generic/msi.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef __ASM_GENERIC_MSI_H
   3#define __ASM_GENERIC_MSI_H
   4
   5#include <linux/types.h>
   6
   7#ifndef NUM_MSI_ALLOC_SCRATCHPAD_REGS
   8# define NUM_MSI_ALLOC_SCRATCHPAD_REGS  2
   9#endif
  10
  11struct msi_desc;
  12
  13/**
  14 * struct msi_alloc_info - Default structure for MSI interrupt allocation.
  15 * @desc:       Pointer to msi descriptor
  16 * @hwirq:      Associated hw interrupt number in the domain
  17 * @scratchpad: Storage for implementation specific scratch data
  18 *
  19 * Architectures can provide their own implementation by not including
  20 * asm-generic/msi.h into their arch specific header file.
  21 */
  22typedef struct msi_alloc_info {
  23        struct msi_desc                 *desc;
  24        irq_hw_number_t                 hwirq;
  25        union {
  26                unsigned long           ul;
  27                void                    *ptr;
  28        } scratchpad[NUM_MSI_ALLOC_SCRATCHPAD_REGS];
  29} msi_alloc_info_t;
  30
  31#define GENERIC_MSI_DOMAIN_OPS          1
  32
  33#endif
  34